Escin Ia

(2S,3S,4S,5R,6R) -6- (((3S,4S,4aR,6aR,6bS,8R,8aR,9R,10R,12aS,14aR,14bR) -9-acetoxy-8-hydroxy-4,8a-bis (hydroxymethyl) -4,6a,6b,11,11,14b-hexamethyl-10- (((E) -2-methylbut-2-enoyl) oxy) -1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydropicen-3-yl) oxy) -4-hydroxy-3,5-bis (((2S,3R,4S,5S,6R) -3,4,5-trihydroxy-6- (hydroxymethyl) tetrahydro-2H-pyran-2-yl) oxy) tetrahydro-2H-pyran-2-carboxylic acid